Error EA displayed; burner does not ignite or shuts down immediately after ignition attempt.

Safety: Turn off power and gas. Do not repeatedly attempt ignition if you smell gas. Ventilate the area and contact a professional if a gas leak is suspected.

• Confirm gas availability: Check that the gas meter is on and that other gas appliances work. Verify the shutoff valve at the heater is open.
• Inspect burner and electrodes: Remove the burner assembly. Clean burner ports and check for rust or debris. Clean and inspect both ignition and flame sensing electrodes, adjusting gaps to Buderus specifications.
• Check wiring: Ensure all electrode and gas valve connectors are secure and undamaged.
• Verify gas type and settings: Confirm that the heater is configured and jetted for the correct gas type (natural gas or LPG) as per the rating plate.
• Professional gas tests: A qualified technician should measure inlet and manifold pressure and verify gas valve operation and combustion quality.
• Reassemble and test: After cleaning and inspection, reassemble, restore gas and power, and attempt ignition while monitoring for stable flame and absence of EA code.